LC
Eastern Olivaceous Flatbill Rhynchocyclus olivaceus



Taxonomy

Taxonomic note
Rhynchocyclus olivaceus and R. aequinoctialis (del Hoyo and Collar 2016) were previously lumped as R. olivaceus following AOU (1998 and supplements), SACC (2005 and updates), Sibley and Monroe (1990, 1993) and Stotz et al. (1996).

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Least Concern
2012 Not Recognised
2008 Not Recognised
2004 Not Recognised
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency high
Land-mass type Average mass 21 g
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 6,050,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend stable - suspected -
Generation length 3.7 years - - -

Population justification: The global population size has not been quantified, but this species is described as 'uncommon and patchily distributed' (Stotz et al. 1996).


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Brazil extant native yes
French Guiana extant native yes
Guyana extant native yes
Suriname extant native yes
Venezuela extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Swamp suitable resident
Altitude 0 - 1000 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2025) Species factsheet: Eastern Olivaceous Flatbill Rhynchocyclus olivaceus. Downloaded from https://datazone.birdlife.org/species/factsheet/eastern-olivaceous-flatbill-rhynchocyclus-olivaceus on 12/01/2025.
Recommended citation for factsheets for more than one species: BirdLife International (2025) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 12/01/2025.